Machine for the mechanical production of the covers for pneumatic tires.



A. MATHERN. MACHINE FOR'THE MECHANICAL PRODUCTION OF THE COVERS FOR PNEUMATIC TIRES.

' APPLICATION man AUG. Hi, I913.

i, 1 86,59 1 4 Patented June 1 3, 1916.

/n Men 'or- 3 To an whom/kit may a UNITED STATES Parana osrion Y ALrHoNsE amm or ZOLLIKON, NEAR ZURICH, SWITZERLAND.

MACH 1161i Fon incitement. 'rnonno'rron or THE COVERS ron PNEUMATIC Y i 'rmns.

' g Application filed Augnst'lfi,

i a eitizenfrof thez-fRepuhlic' dffl France, re- :-siding.:-at-.:Zollikon,' near Zurioh;=-in the Canton-of Zurich; Republicfo'f Switzerland,'

have -.invented*certain'new midi-useful Improvements in Machines for the Mechanical" Production of ;the Covers for/Pneumatic Tires; and I do hereby declare the following to' bee full, clear, and exact description of the invention, such 'as will enahle others I skilled in the art to' whi'ch' it appertains to serving to provide make and-use th -samezr ie'renee being had to theaceo fipanyingf awingsg and to let' tersiaiofreference thereon, which orm=a partpf=fth1s 1 This invention a method of and ammo for theimecha'nical production of the I hoversforpneumatic tires.'-

' It is 'usual to provide covers for. pneumatic tires with plies or layers ofcanva's or similar .fabrio'coated with "rubber and stretched overya core-or orming ring with the aid: o r d zeral-18x ,"f cordin'g a 1 1 thefplies. or layers is stretched along the inedian portion previous t passing on to the forming-ring upon which it is further stretched and applied by smoothing rollers arranged to travel over an eccentric path on the forming-ring. For

1 this purpose l provide a vmachine'which is automat c inaction for stretghing applying andfsi'noothingth fabric an i for applying the bei ds. F1

eccentric travel I ed; on a 've ca'lly sw nging Whic arm. I, L p

The accomp'nying drawings" show the machine and various detail parts for carry-. ing out the, work.

Figure 1, isa front elevation of the com i plete machine. Fig. 2is a plan with a por.

draws the 'material from jth Specification of Letters I'atent.

Patented June 13 1913. Serial No. 785,087.

I on the line J'K. Figs. 10, 11 and 12, aresections showing the work at three different I stages. e

On a suitable bed 1 are mounted various shafts, the shaft 2- of which carries at one end the forming ring 16, while the shafts 3 and 4 serve in driving the main shaft 2.

tion with smoothing rollers for sticking down the edges and adjacent portions of the material of the cover, and shafts 6 and-'7. serve for driving the stretching device as also the small rollers on the shafts 8, 9

and 10..

The step 'pulley 11* is 'driven from an overhead shaft and is fasten the shaft 3 which through the intervention of bevel wheels, 12 and 13 drives the shaft 4 upon which is fixed a worm, not seen. The worm 'dIIVGS utL wormwheel 14 which drives the main shaft- 2 through the intervention of a toothed clutch 15. With this mechanical arrangement, the forming ring makes one 'revolution'a minute. The peripheral speed of the drum 14:, mounted on the shaft 7, is

A shaft 5 drives eccentric arms in connecslightly less than that of the forming ring 1 and is controlled by hovel gears shaft 6, andhevel gears 39-.

The prepared rubber-coated canvas or like material, previously wound onthe drum 19, is prevented from sticking together by being wound up in the known manner with an intervening strip of ordinary material' The drum 19 is keyed. on its shaft 9 and the latter is causedto rotate by reason of the drawing off of the coated material. On the shaft 9 is fast. a strap-pulley 20, the strap driving a similar pulley 21 fast on theshait 10 which carries a. drum 22 for winding up the intermediate strip withdrawn from the coated material. on the Bruin 19 in a manner previously carried out.

For starting the operation. the of the. rubber-coated material istaken in. flat condition over the guide.) ller 23 and then'iiiider the convex stretc drum 2t and cemented on. to the forming; ring 16 which is'in contact with thet-. .for mer. The machine s then started st 'dru n on ilDPQ-r portion of th the pulling action and theadhesireness of .-..1'1 1 I' the material impartingto ency tii cling to the drum 'hich has a definite peripheral speed wh ch s, less than loose end .ihat the ring 1(3 1 ring .6.-

'hit er a tendstretching of the material will be constant.

For altering-the stretching of the material, it is necessary -to' use another drum having a differentperipheral speed. "During the operation it is impossible to have irregular stretching of the material.

By this system of operating, the coatedmaterial is simultaneously stretched and.

gummed to the other portion of the ring 16 so that only. the edge portions of the said material remain loose and strongly rufiled or puckered along the sides of the ring 16. During the rotation of the latter, the material is brought under the rollers 25 which run along an eccentric curve 29, Fig. 1,- at both sides of the ring 16. For this purpose, the rollers, 25 are mounted on a swinging arm 26 which is controlled through the'intervention of a connecting rod 27 operated by a crank disk 28 on shaft 5 which is driven by pulleys 40. I The curve traversed by the rollers 25 pass' from the edges toward the periphery and back so that the side portions offthe material are stretched and cemented to the. ring in'a regular mannenthe rollers being strongly. pressed against the latter by springs 41. The progressive condition of the curve enables the rollers to completely smooth and press' the material. In this manner the material is secured in position and by the continued rotation of the ring 16, one, two or more layers can be applied at one operation While being automatically stretched, applied and smoothed so as to assume the form indicated at Fig. 10.

It is now necessary to apply the beads according to Fig. 11, for whichpurpose the following parts are used: The cross 30,

Figs. 2, 5 and 6, is permanently retained on the shaft 2 and has in each arm a slot or groove into which the four arms of the gage 31 are secured, see Figs. 3, 4 and 9. The slots may be so arranged as to slip the arms in sidewise and so secure or release same by turning the gage in the one or the other direction. After the gage 31 has been fixed 'to the cross 30, the latter is moved along the shaft 2 close against the ring 16.,whereon a freely falling pawl enters a mick-sprovided in shaft 2 and prevents shifting back. The outer gage 32 is then applied to the projectin'g end of the shaft 2 and fixed by a screw nut 33 or otherwise suitably, see Figs.

7, 8 and 9. The two gages are secured together by spring-controlled hooks 34," 35.

'The clutch 15 is then set so as to leave the wormwheel 1 1 free and to get the drive through the toothed wheel 17 and pinion 18.

necessary to finish the work according to the manner illustrated in Fig. 11. F or this purpose thegage 32 is removed and gage 31 is shifted back, while themachine is thrown back to slow speed in order that two or more coverings of material may be applied according to Fig. 12, the work being carried out in the same manner ashas been 'de-" scribed in connection with the'inner'layers.

What I claim is 1. A machine for manufacturing covers for pneumatic tires from rubber coated material comprising in combination a convex. Y drum, a forming ring, means for feeding the rubber coated material, in contact with said drum, to said forming ring, said forming ring and drum being in close proximity so that the material is pressed between them and means for positively controlling the speed of said drum so that it operates at a less peripheral speed than the peripheral speed of the forming ring. A

2. A machine for manufacturing covers for pneumatic tires from rubber coated material comprising a forming ring, means for feeding the rubber-coated material to said ring, a single smoothing device on each side of said ring, and means for moving said smoothing devices along the sides of the forming ring in an arc-which is eccentric to the ring and extends across the whole depth of said sides.

3. A machine for manufacturing covers for pneumatic tires from rubber coated material comprising a forming ring. mea'nsfor feeding the rubber coated material to said ring, a "pair of spring-pressed smoothing rollers arranged one on each side of said ring and carried on an arm pivoted eccentrically to said ring, and means for oscillating said arm so that the rollers move across the sides of the forming ring in an are which is eccentric to the ring and extends across the whole depth of said sides.

4. In a machine'for manufacturing covers, with bead members, for pneumatic tires, a shaft, a forming ring carried thereon, a gage for centering the bead members consisting of an annular gage axially adjustable and retainable on said shaft, and a second annular gage adapted to be coupled to the first named annular gage by -means of with head members, for pneumatic tires, a

shaft, a forming ring carried thereon, having a projecting flange on eachside of its inner rim portion, a gage for centering the name to this specification in the presence of bead1 1memclloers egnsistinig of an aglnular gag; two subscribing Witnesses. axia y a justa e an retaina e on sai shaft, and a second annular gage adapted to ALPHOINSE MATHERN' 5 be coupled to the first named annular gage Witnesses:

by means of spring hooks. HERMANN HUBER,

In testimony whereof, I have signed my CARL GUBERL 

